package cn.tedu.v3_1;

import java.io.*;
import java.net.*;
import java.util.*;

/**
 *Server  端---流置空  升级
 */

public class Server {
    private ServerSocket serverSocket;

    //优化1.端口号提前声明：私有属性
    private static final Integer PORT=0101;
    public Server() {
        try {
            serverSocket = new ServerSocket(PORT);
        } catch (BindException e) {
            System.out.println("请检查端口号，被占用~");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void start() {
        try {
            while (true) {
                System.out.println("欢迎进入张煜炫的聊天室~");
                System.out.println("等待客户端连接");
                Socket socket = serverSocket.accept();
                new Thread(new ClientHandler(socket)).start();
            }
        } catch (IOException e) {
            System.out.println("客户端连接失效了~");
        } finally {

            if (serverSocket != null && !serverSocket.isClosed()) {
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    System.out.println("服务器关闭失败~~~");
                }
                System.out.println("服务器关闭成功~~Over");
            }
        }
    }

    public static void main(String[] args) {
        new Server().start();
    }
//ClientHandler多线程类：控制客户端发来的通讯消息
    private class ClientHandler implements Runnable {
        private Socket socket;
        private String ip;
        //Server  --ClientHandler类  ---输入  输出  流  关闭
        //Client  ---start() ---输入  输出  流  关闭
        private PrintWriter pw;
        private BufferedReader br;

        public ClientHandler(Socket s) {
            //1.明确接入客户端  通讯类  Socket
            this.socket = s;
            //2.给明确接入客户端，IP地址
            ip=socket.getInetAddress().getHostAddress();
            //3.给明确接入客户端，读写功能
            try {
                br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
                pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
            } catch (IOException e) {
                System.out.println("客户端断开链接了~");
            }
        }

        public void run() {

            try {

                new Thread(() -> {
                    try {
                        String message;
                        while ((message = br.readLine()) != null) {//读入客户端
                            System.out.println(ip + "客户端说：" + message);
                            System.out.println("服务器端请输入：");
                        }
                    } catch (IOException e) {
                        System.out.println("客户端发来的消息断开了~");
                    }
                }).start();
                Scanner input = new Scanner(System.in);
                while (true) {
                    System.out.println("服务器请输入：");
                    String sme = input.nextLine();
                    pw.println("服务器说：" + sme);
                    System.out.println("请发送信息");
                    System.out.println("用户输入的文字为？？？？？");
                }
            } finally {
                if (pw != null)
                    pw.close();
                if (br != null) {
                    try {
                        br.close();
                    } catch (IOException e) {
                        System.out.println("读入流断开连接");
                    }
                    if (socket != null && !socket.isClosed()) {
                        System.out.println(ip + "客户端退出服务器链接~");
                        try {
                            socket.close();
                        } catch (IOException e) {
                            System.out.println(ip + "客户端退出链接异常~");
                        }
                    }
                }

            }
        }
    }
}

